OpenVPN Configuration over Port 443 on Ubuntu Linux
OpenVPN provides a secure and encrypted VPN tunnel across public network. Unlike PPTP and L2TP VPN Services which can be blocked, OpenVPN can highly be customized and even can be run over so popular TCP Port 443. So, OpenVPN cannot easily be blocked. OpenVPN uses SSL/TLS Certificates. So, OpenVPN Tunnel is a trusted tunnel to send and receive data across public network. OpenVPN Server can easily install on Ubuntu Server. Installing OpenVPN Server on Ubuntu Server, we can connect Windows, Linux, MacOS or MikroTik RouterOS as OpenVPN client and can transmit data securely over public network. The goal of this article is to configure OpenVPN Server over TCP or UDP port 443 and then connect Windows, Linux, RouterOS, MacOS and Android OpenVPN client for transmitting data securely over public network. Installing OpenVPN Server on Ubuntu Server 20.04 OpenVPN Server installation and configuration on Ubuntu Server is not so difficult but we have to have UpToDate Ubuntu Server Installed. If you have Ubuntu Server installed before, issue the following command to update your Ubuntu Server. $ sudo apt update $ sudo apt upgrade We also should have proper network configuration in Ubuntu Server. To access OpenVPN Server globally, we have to [...]
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MikroTik DHCP Server Configuration in RouterOS v7 | May 18, 2022
Dynamic Host Configuration Protocol (DHCP) is a client/server protocol where a DHCP server automatically provides an Internet Protocol (IP) address and other related information such as subnet mask, default gateway and DNS to DHCP clients. DHCP server and client use UDP port 67 and 68 for communication. In a network, a DHCP client (IP devices such as Desktop, Laptop, Smartphone etc.) requests for an IP lease sending broadcast message over 67/UDP port to any DHCP server and a DHCP server responses [...]
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Firewalld Installation and Configuration in Ubuntu Server | May 5, 2022
Firewalld is an awesome host based firewall management tool for Linux Operating System. Firewalld has developed on Fedora but it is now available for almost all Linux distributions. So, Firewalld can be installed in Ubuntu Server although Ubuntu Server has UFW as the default firewall system. Firewalld is more robust and easy to maintain than UFW, I think. So, I am going to discuss how to install and configure Firewalld in Ubuntu Server. Installing Firewalld in Ubuntu Server By default [...]
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MikroTik Hotspot Customized Login Template | April 14, 2022
MikroTik Hotspot is a popular service which is being used to manage ISP, Hotel, Restaurant, Airport, Public WiFi and even Enterprise office network. User management with MikroTik Hotspot captive portal is so easy and secure. Besides manageable network, Hotspot also provides facility to advertise your brand. MikroTik Hotspot offers a login page for user authentication whenever any device connects with it. So, this login page is a vital source for promoting your brands. The default login template provided by MikroTik [...]
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How to Configure MikroTik RouterOS v7 First Time | March 5, 2022
MikroTik RouterOS v7 (both Long-term and Stable) has been released with new features. So, it is usual that if you buy a new MikroTik Router, it will be RouterOS v7. RouterOS v7 has some changes. So, if you are an old RouterOS user, you may face some new features those were not in the previous version. But there is no need to be heisted because there is a correlation between the old and the new versions. So, you can absorb [...]
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How to Import SSL Certificate in MikroTik RouterOS | January 16, 2022
SSL/TLS Certificate is used to make secure communication between server and clients. MikroTik RouterOS has a lot of services such OVPN, SSTP VPN, HTTPS, Hotspot and so on those use SSL/TLS certificate. It is possible to create self-signed certificate in MikroTik RouterOS but self-signed certificate faces untrusted CA warning. So, it is always better to use trusted CA either freemium or premium. In my previous article, I discussed how to get a free SSL/TLS certificate from Zero SSL but Zero [...]
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How to Assign VMware ESXi License Key | December 4, 2021
No doubt VMware is the pioneer in virtualization world. VMware can be used either premium or free based on licensing. In the previous article, I discussed how to install VMware ESXi on a physical server or machine and then I also discussed how to get VMware ESXi free license from VMware website. Getting VMware ESXi license key either premium or free, we may sometimes get confused how to assign the license key in VMware ESXi host. So, in this article [...]
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How to Get VMware ESXi Free License | November 5, 2021
You are here that means you are finding how to get ESXi free license because you have installed ESXi 6.7 or ESXi 7 and 60 days trial license has been expired and then all virtual machines have been powered off or you want to use VMware ESXi absolutely free of charge. Whatever your requirement, it is a good news that VMware provides free license with some limitations to use VMware ESXi absolutely free of charge. So, if you have a [...]
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MikroTik Hotspot Configuration with ECMP Load Balancing | September 4, 2021
MikroTik Hotspot is one of the most popular services in MikroTik RouterOS and day be day the demand of Hotspot service is increasing. MikroTik Hotspot can be used in any Airport, Hotel, Restaurant, Campus, Camp, Office or any ISP network. It is also possible to establish a WiFi Broadband Network with the MikroTik Hotspot service. How to configure MikroTik Hotspot was discussed in one of my previous articles. Although MikroTik Hotspot configuration is not so difficult but sometimes we face [...]
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Apache2 Web Server HTTPS Configuration on Ubuntu Server | August 15, 2021
Data transmission between web server and web client over port 80 (HTTP) is not encrypted. So, any middle man between web server and web client can view transmitted data and can steal secret information. To overcome this limitation, HTTPS Protocol over port 443 has been introduced. HTTPS is a secure web server that is configured with SSL/TLS certificate. TLS (Transport Layer Security) and its predecessor SSL (Secure Sockets Layer) are web protocols used to wrap normal traffic in a protected, [...]
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